U.S. patent application number 11/327080 was filed with the patent office on 2006-07-13 for card connector.
Invention is credited to Yoshinori Watanabe.
Application Number | 20060154528 11/327080 |
Document ID | / |
Family ID | 36295432 |
Filed Date | 2006-07-13 |
United States Patent
Application |
20060154528 |
Kind Code |
A1 |
Watanabe; Yoshinori |
July 13, 2006 |
Card connector
Abstract
A card connector comprises an insulating housing having a first
card receiving slot provided with a plurality of contacts. At least
one elastic projection extends into the first card receiving slot.
The elastic projection is formed to have a first inclined surface
that rises at an inclination in a card insertion direction and a
second inclined surface that rises at an inclination in a card
removal direction. The second inclined surface is steeper than the
first inclined surface. A first card electrically connected to the
contacts. The first card is removeably receivable in the first card
receiving slot and has a flange protruding from a main surface
thereof. The flange is formed to engage the first inclined surface
when the first card is inserted in the first card receiving slot
and to engage the second inclined surface when the first card is
removed from the first card receiving slot.
Inventors: |
Watanabe; Yoshinori;
(Kanagawa, JP) |
Correspondence
Address: |
BARLEY SNYDER, LLC
1000 WESTLAKES DRIVE, SUITE 275
BERWYN
PA
19312
US
|
Family ID: |
36295432 |
Appl. No.: |
11/327080 |
Filed: |
January 6, 2006 |
Current U.S.
Class: |
439/630 |
Current CPC
Class: |
H01R 13/639
20130101 |
Class at
Publication: |
439/630 |
International
Class: |
H01R 24/00 20060101
H01R024/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 7, 2005 |
JP |
2005-002745 |
Claims
1. A card connector, comprising: an insulating housing having a
first card receiving slot provided with a plurality of contacts; at
least one elastic projection having a first inclined surface that
rises at an inclination in a card insertion direction and a second
inclined surface that rises at an inclination in a card removal
direction, the second inclined surface being steeper than the first
inclined surface, the first and second inclined surfaces extending
into the first card receiving slot; and a first card that
electrically connects with the contacts, the first card being
removeably receivable in the first card receiving slot and having a
flange protruding from a main surface thereof, the flange being
formed to engage the first inclined surface when the first card is
inserted in the first card receiving slot and engage the second
inclined surface when the first card is removed from the first card
receiving slot.
2. The card connector of claim 1, wherein an apex of the first
inclined surface is connected to an apex of the second inclined
surface.
3. The card connector of claim 1, wherein the first card is a
personal computer card.
4. The card connector of claim 1, wherein the first and second
inclined surfaces extend into the first card receiving slot in a
position opposing the contacts.
5. The card connector of claim 1, further comprising a second card
receiving slot that removeably receives a second card and a
partition frame dividing the first and second card receiving slots,
the elastic projection extending from the partition frame.
6. The card connector of claim 5, wherein the partition frame and
the elastic projection are integrally formed from a metal
sheet.
7. A card connector, comprising: an insulating housing having a
first card receiving slot provided with a plurality of contacts; at
least one elastic projection extending into the first card
receiving slot; and a first card that electrically connects with
the contacts, the first card being removeably receivable in the
first card receiving slot and having a flange protruding from a
main surface thereof that engages the elastic projection, the
elastic projection being formed to lift the card upward when the
first card is inserted in the first card receiving slot and the
elastic projection being formed to lift the card upward when the
first card is removed from the first card receiving slot.
8. The card connector of claim 7, wherein elastic projection has a
first inclined surface that rises at an inclination in a card
insertion direction and a second inclined surface that rises at an
inclination in a card removal direction, the second inclined
surface being steeper than the first inclined surface
9. The card connector of claim 8, wherein an apex of the first
inclined surface is connected to an apex of the second inclined
surface.
10. The card connector of claim 7, wherein the first card is a
personal computer card.
11. The card connector of claim 7, wherein the elastic projection
extends into the first card receiving slot in a position opposing
the contacts.
12. The card connector of claim 7, further comprising a second card
receiving slot that removeably receives a second card and a
partition frame dividing the first and second card receiving slots,
the elastic projection extending from the partition frame.
13. The card connector of claim 12, wherein the partition frame and
the elastic projection are integrally formed from a metal sheet.
Description
FIELD OF THE INVENTION
[0001] The invention relates to a card connector having at least
one elastic projection that engages a first card inserted therein
for providing a low card insertion force and a high card removal
force.
BACKGROUND OF THE INVENTION
[0002] FIGS. 7-9 (see JP 2000-353558A) show a first example of a
card connector 101 according to the prior art. The card connector
101 is structured so that the force required fore removing a card
inserted therein is increased while the force required for
inserting the card therein is reduced. Thus, the reliability of the
card connector is increased due to the increased card holding
power.
[0003] The card connector 101 comprises an insulating housing 110
and a plurality of contacts 120 that are attached to the housing
110. The housing 110 is substantially rectangular and has a card
receiving opening 112 that passes through the housing 110 in a
direction of thickness of the housing 110. The card receiving
opening 112 is designed so that a card C is inserted into the card
receiving opening 112 from a front side (left side in FIG. 7)
toward a rear side of the card receiving opening 112 and so that
the card C is removed in the opposite direction. A plurality of
contact accommodating passages 111 extend from the card receiving
opening 112 in a direction perpendicular to the direction of
insertion and removal of the card C. The contact accommodating
passages 111 are formed so that the contact accommodating passages
111 face each other from above and below on either side of the card
receiving opening 112.
[0004] Each of the contacts 120 comprises an attachment member 121
that is secured to a side wall of the corresponding contact
accommodating passage 111. The attachment member 121 is
press-fitted to a rear-end portion of the side wall of the
corresponding contact accommodating passage 111. A bent member 122
extends from one end of the attachment member 121. The bent member
122 first extends forward at an inclination from one end of the
attachment member 121 and is then bent back to extend rearward at
an inclination. A contact member 123 extends from an end of the
bent member 122. The contact member 123 includes a contact
protruding member 123b and a tip 123a. The contact member 123 first
extends forward at an inclination from the end of the bent member
122 such that the contact protruding member 123b protrudes to an
interior of the card receiving opening 112. The contact member 123
then extends forward at an inclination after being bent back from
the contact protruding member 123b. The tip 123a of the contact
member 123 is accommodated inside the corresponding contact
accommodating passage 111. A connecting member 124 extends from the
other end of the attachment member 121. The connecting member 124
is connected to an outside of the corresponding contact
accommodating passage 111. Each of the contacts 120 may be formed
by stamping and forming a metal plate.
[0005] As shown in FIG. 8A, when the card C is inserted into the
card receiving opening 112, the card C contacts the contact
protruding member 123b of the contact member 123 so that the
contact member 123 is pushed in the direction of insertion of the
card C and away from the card receiving opening 112. As shown in
FIGS. 8B-8C, the bent member 122 is compressed so that an angle G
in a central portion of the bent member 122 is reduced.
Consequently, the contact protruding member 123b is accommodated
inside the contact accommodating passage 111, and the contact
member 123 almost in its entirety is positioned at a boundary
surface between the contact accommodating passage 111 and the card
receiving opening 112. Accordingly, the contact member 123 contacts
the card C with its entire surface, which appropriately suppresses
the contact pressure that the card C receives from the contact
members 123 during the insertion of the card C, thus reducing the
force required for the insertion of the card C.
[0006] As shown in FIG. 9A, when the card C is removed from the
card receiving opening 112, the contact member 123 is dragged in
the direction of card removal. As shown in FIGS. 9B-9C, the tip
123a of the contact member 123 contacts a front wall of the contact
accommodating passage 111. The contact protruding member 123b of
the contact member 123 rises toward the card receiving opening 112
with the tip 123a acting as a fulcrum and strongly presses against
the card C after making contact with the card C in a more or less
point contact state. The force required for removing the card C is
therefore increased, so that the holding power exerted on the card
C in the card connector 101 is increased.
[0007] In the card connector 101 shown in FIG. 7, however, when the
card C is removed from the card receiving opening 112, the contact
protruding members 123b of the contact members 123 of the contacts
120 come into contact and strongly press against the card C in a
more or less point contact state. As a result, the force required
for the removal of the card C is increased, and the holding power
exerted on the card C is heightened. However, the holding power
exerted on the card C is merely increased by the spring force of
the contacts 120 so that the holding power exerted on the card C is
still not adequate. Therefore, in cases where an external force is
applied to the card connector 101, there is still a danger that the
card C will drop out of the card connector 101. Since nothing other
than the spring force of the contacts 120 is utilized to increase
the holding power exerted on the card C, in cases where an external
force is applied to the card connector 101, there are cases in
which the load applied to the contacts 120 is so excessive that the
contacts 120 may be damaged. Moreover, if the spring force of the
contacts 120 is increased, there are cases in which the card
contact points provided on the card C may also be damaged (e.g.,
stripping of the plating) as a result of the numerous number of
times the card C is inserted and removed.
[0008] FIGS. 10A-10B (see JP 2002-42932A) show another example of a
card connector 201 according to the prior art. The card connector
201 is structured to reduce the insertion force of a card (not
shown) and to prevent the card (not shown) from dropping out.
[0009] The card connector 201 comprises an insulating housing 210
and a plurality of contacts 220 that are attached to the housing
210. A card holder 230 is held inside the housing 210 in a
pivotable manner. The housing 210 has a base member 211 that
extends in a direction of width and side plate members 212a, 212b
that are provided on both ends of the base member 211 in the
direction of width. The side plate members 212a, 212b extend in a
card insertion direction X and in a card removal direction Y. A
card insertion slot 212 is formed between the side plate members
212a, 212b at a rear end of the housing 210. A bridge 215 is
provided on an upper portion of the side plate members 212a, 212b
at rear ends thereof in the card insertion direction X. Shaft
members 213 (only one side is shown in FIG. 10B) are provided on
mutually facing inner surfaces of the side plate members 212a, 212b
substantially in a center thereof. First positioning members (not
shown) for positioning the card holder 230 in a first position into
which the card (not shown) can be inserted into and removed from
the card holder 230 and second positioning members 214 for
positioning the card holder 230 in a second position into which
contact point members (not shown) provided on an bottom surface of
the card (not shown) can be caused to contact the contacts 220 are
present on mutually facing inner surfaces of the side plate members
212a, 212b toward the rear ends thereof. The first positioning
members (not shown) are provided in a lower portion of the mutually
facing inner surfaces of the side plate members 212a, 212b. The
second positioning members 214 are provided in an upper portion of
the mutually facing inner surfaces of the side plate members 212a,
212b.
[0010] The contacts 220 are attached to the base member 211 of the
housing 210 at a specified pitch along the direction of width.
Contact members 221 protrude upward from an upper surface of the
base member 211. The contact members 221 are designed to be
contacted by contact points (not shown) provided on the bottom
surface of the card (not shown) when the card (not shown) is
located in the second position.
[0011] The card holder 230 comprises a card placement member 231
that extends in a direction of width. Holder side plate members
232a, 232b are formed by bending both ends of the card placement
member 231 in the direction of width so that the holder side plate
members 232a, 232b respectively face the side plate members 212a,
212b. Guide members 233a, 233b are formed by bending the holder
side plate members 232a, 232b inward from the side plate members
212a, 212b. The holder side plate members 232a, 232b are attached
in a pivotable manner to the shaft members 213 that are
respectively provided on the side plate members 212a, 212b of the
housing 210. First locking members (not shown) that are locked with
the first positioning members (not shown) of the housing 210 and
second locking members (not shown) that are locked with the second
positioning members 214 are provided on the holder side plate
members 232a, 232b of the card holder 230.
[0012] FIG. 10A shows a state in which the first locking members
(not shown) of the card holder 230 are locked with the first
positioning members (not shown) of the housing 210. At this point,
the card holder 230 is substantially parallel to the housing 210 so
that the card (not shown) can be inserted into the card holder 230
from the rear end side in the card insertion direction X. In this
case, since the front end member of the card holder 230 is away
from the contact members 221 of the contacts 220, there is no
contact between the card contact point members (not shown) and the
contact members 221 of the contacts 220 even when the card (not
shown) is inserted. Accordingly, the contact force of the contacts
220 does not affect the card insertion force so that the card (not
shown) can be inserted into the card holder 230 with little
force.
[0013] In contrast, if the rear end of the card is lifted up in the
direction of arrow Z1 in FIG. 10B after the card (not shown) has
been inserted into a specified position of the card holder 230, the
card holder 230 is also caused to rotate with the shafts 213 as
fulcrums so that the second locking members (not shown) are locked
with the second positioning members 214. The movement of the card
holder 230 is thus restricted in the returning direction. As a
result, the card holder 230 is fastened in place. The front end
member of the card holder 230 moves in the direction of arrow Z2 as
a result of the rotation of the card holder 230 so that the card
contact points (not shown) of the card (not shown) and the contact
members 221 of the contacts 220 come into contact. In this case, a
rear end of the card (not shown) is blocked by the locking members
216a, 216b of the housing 210 so that the card (not shown) is
locked into place. Accordingly, the card (not shown) does not drop
out of the card holder 230 even if the card connector 201 is tilted
in the card removal direction Y.
[0014] In the case of the card connector 201 shown in FIGS.
10A-10B, however, although there is no danger of the card (not
shown) dropping out of the card holder 230 or of the contacts 220
being damaged, the card holder 230 is necessary to hold the card
(not shown). Therefore, the card connector 201 requires extra
components and has a complex construction.
BRIEF SUMMARY OF THE INVENTION
[0015] It is therefore an object of the invention to provide a card
connector which has a simple construction and can securely increase
the force required for removing the card while reducing the force
required for inserting the card without damaging the contacts or
the card contact points while preventing the card from
unintentionally dropping out of the card connector.
[0016] This and other objects are achieved by a card connector
comprising an insulating housing having a first card receiving slot
provided with a plurality of contacts. At least one elastic
projection extends into the first card receiving slot. The elastic
projection is formed to have a first inclined surface that rises at
an inclination in a card insertion direction and a second inclined
surface that rises at an inclination in a card removal direction.
The second inclined surface is steeper than the first inclined
surface. A first card electrically connected to the contacts. The
first card is removeably receivable in the first card receiving
slot and has a flange protruding from a main surface thereof. The
flange is formed to engage the first inclined surface when the
first card is inserted in the first card receiving slot and to
engage the second inclined surface when the first card is removed
from the first card receiving slot.
[0017] This and other objects are further achieved by a card
connector comprising an insulating housing having a first card
receiving slot provided with a plurality of contacts. At least one
elastic projection extends into the first card receiving slot. A
first electrically connects with the contacts. The first card is
removeably receivable in the first card receiving slot and has a
flange protruding from a main surface thereof that engages the
elastic projection. The elastic projection is formed to lift the
card upward when the first card is inserted in the first card
receiving slot, and the elastic projection is formed to lift the
card upward when the first card is removed from the first card
receiving slot.
DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1A is a plan view of a card connector according to the
invention;
[0019] FIG. 1B is a front view of the card connector of FIG. 1;
[0020] FIG. 2A is a right side view of the card connector of FIG.
1;
[0021] FIG. 2B is a left side view of the card connector of FIG.
1;
[0022] FIG. 3 is a bottom view of the card connector of FIG. 1;
[0023] FIG. 4 is a sectional view taken along line 4-4 of FIG.
1B;
[0024] FIG. 5 is a sectional view along line 5-5 of FIG. 1B;
[0025] FIG. 6A is a sectional view of the card connector of FIG. 1
prior to insertion of a first card;
[0026] FIG. 6B is a sectional view of the card connector of FIG. 1
following insertion of the first card;
[0027] FIG. 7 is a sectional view of a card connector according to
the prior art;
[0028] FIG. 8A is a schematic diagram showing insertion of a card
into the card connector of FIG. 7;
[0029] FIG. 8B is a schematic diagram showing insertion of the card
into the card connector of FIG. 7;
[0030] FIG. 8C is a schematic diagram showing insertion of the card
into the card connector of FIG. 7;
[0031] FIG. 9A is a schematic diagram showing removal of the card
into the card connector of FIG. 7;
[0032] FIG. 9B is a schematic diagram showing removal of the card
into the card connector of FIG. 7;
[0033] FIG. 9C is a schematic diagram showing removal of the card
into the card connector of FIG. 7;
[0034] FIG. 10A is a perspective view of another card connector
according to the prior art showing the card connector in a first
position; and
[0035] FIG. 101B is a perspective view of the card connector of
FIG. 10A showing the card connector in a second position.
DETAILED DESCRIPTION OF THE INVENTION
[0036] FIGS. 1A-6B show a card connector 1 according to the
invention. As shown in FIGS. 1A-1B, the card connector 1 comprises
a first card receiving slot 20 into which a first card C1 is
inserted in a card insertion direction X and from which the first
card C1 is removed in a card removal direction Y. A second card
receiving slot 30 is provided substantially beneath the first card
receiving slot 20 into which a second card C2 is inserted in the
card insertion direction X and from which the second card C2 is
removed in the card removal direction Y. The inserted first and
second cards C1, C2 are connected via a connection member 10. An
interior side in the card insertion direction X shall be referred
to herein as a front side, and a side opposite thereof shall be
referred to as a rear side.
[0037] The first card C1 may be, for example, a memory card or
"express card" that conforms to Personal Computer Memory Card
International Association (PCMCIA) standards. For example, the
first card C1 may be of a type that has a first shoulder member in
which a first side portion of a front of a main body of the first
card C1 is formed in a substantially wide, flat plate cut-out shape
or a type that has a narrow width and has substantially straight
sides. Both a mating connector member of a wide type express card
and a mating connector member of a narrow type express card are the
same, so that both the wide type express card and narrow type
express card can be inserted into and removed from the first card
receiving slot 20. The following description, however, will involve
cases in which a wide type express card is inserted and removed
there from. As shown in FIGS. 6A-6B, the first card C1 has a main
body C1a with a front end portion having a flange C1b that
protrudes from a main surface thereof. In the illustrated
embodiment, the flange C1b protrudes from a bottom surface of the
main body C1. The second card C2 is a conventional personal
computer (PC) card according to PCMCIA standards. The second card
C2 does not have a flange that protrudes from a main surface
thereof.
[0038] As shown in FIGS. 2A-2B, the connection member 10 has an
insulating housing 11. The housing 11 is provided with screw
openings 17 for fastening the housing 11 to a surface of a circuit
board (not shown). The housing 11 comprises a first housing 12 and
a second housing 13 that is provided beneath the first housing 12,
as shown in FIG. 5. The first housing 12 is provided in a position
corresponding to the first card receiving slot 20 in a vertical
direction and on a front side of the first card receiving slot 20.
The first housing 12 comprises an accommodating member 12a that
accommodates a substantially rectangular body 14 to which a
plurality of first contacts 15 that extend in the card insertion
direction X are attached. As shown in FIG. 4, a guide member 12b is
provided on a first side of the accommodating member 12a and guides
the insertion and removal of a first-side surface of a front end of
the first card C1. The guide member 12b protrudes toward the rear
with respect to the accommodating member 12a. An inclined guide
surface 12d is formed on a rear side of the guide member 12b. The
inclined guide surface 12d has a substantially small width and both
sides thereof are substantially straight to the connection member
10. The inclined guide surface 12d is formed to lead the first card
C1. As shown in FIG. 5, a plate-form member 12c is formed on the
accommodating member 12a and protrudes rearward.
[0039] As shown in FIGS. 6A-6B, each of the first contacts 15 has
an elastic contact member 15a provided on a rear end thereof that
elastically contacts a card contact point (not shown) on the first
card C1 when the first card C1 is inserted in the card connector 1.
The elastic contact members 15a are disposed so as to be exposed on
a lower side of the platform member 12c. A front end of the first
contacts 12 is connected, for example, by soldering to a relay
substrate 18.
[0040] As shown in FIG. 5, the second housing 13 is provided in a
position corresponding to the second card receiving slot 30 and is
arranged in a vertical direction on a front side of the second card
receiving slot 30. A plurality of second contacts 16 that extend in
the card insertion direction X are attached to the second housing
13. The second contacts 16 are configured such that rear end
members thereof respectively contact contacts (not shown) provided
on the second card C2 when the second card C2 is inserted. Front
end members of the second contacts 16 are connected by soldering,
for example, to the relay substrate 18.
[0041] As shown in FIG. 1B, the first card receiving slot 20 is
constructed from a partition frame 21 that forms a division between
the first card receiving slot 20 and the second card receiving slot
30. The partition frame 21 is attached to the lower portion of the
first housing 12 and extends toward the rear, as shown in FIG. 5.
As shown in FIGS. 1A and 5, a first guide arm 22 extends rearward
from a second end member of the accommodating member 12a. A top
shell 23 covers an upper portion of the first housing 12 and first
guide arm 22. A first plate member 23a is bent downward from a
first edge of the top shell 23, as shown in FIG. 1B. When the first
card C1 is inserted into and removed from the first card receiving
slot 20, an inner surface of the first guide arm 22 guides the
second-side surface of the first card C1, and the inner surfaces of
the first plate member 23a and the guide member 12b of the first
housing 12 guide the first-side surface of the first card C1. The
partition frame 21 and top shell 23 may each be formed, for
example, by stamping and forming a metal plate.
[0042] As is shown in FIGS. 4 and 6A-6B, a plurality of elastic
projections 24 over which the flange C1b of the first card C1
climbs when the first card C1 is inserted into the first card
receiving slot 20 are formed so as to protrude upward from the
front end member of the partition frame 21. As is shown in FIGS.
6A-6B, each of the elastic projections 24 has a first inclined
surface 24a that rises at a gradual inclination from the partition
frame 21 in the card insertion direction X. A second inclined
surface 24b rises at a substantially steep inclination from the
partition frame 21 moving in the card removal direction Y. An apex
of the first inclined surface 24a and an apex of the second
inclined surface 24b are connected to each other. Each of the
elastic projections 24 is therefore formed in a substantially
asymmetrical triangular shape as seen from a side thereof. The
elastic projections 24 height is determined by taking into account
rattling in a vertical direction, the amount of deformation of the
first contacts 15, and the amount of deformation of the elastic
projections 24 relative to a height of the flange C1b. The first
inclined surfaces 24a may have an angle of inclination with respect
to the partition frame 21 of, for example, approximately 15 degrees
and the angle of inclination of the second inclined surfaces 24b
may have an angle of inclination with respect to the partition
frame 21 of, for example, approximately 60 degrees relative to the
height of the elastic projections 24.
[0043] As shown in FIG. 1B, the second card receiving slot 30 is
constructed from the partition frame 21 that forms the division
between the first card receiving slot 20 and the second card
receiving slot 30. A second guide arm 32 extends rearward from a
second end member of the second housing 13. A bottom shell 31
covers a lower portion of the second housing 13, the second guide
arm 32, and a plate member 31a that is bent upward from a first
edge of the bottom shell 31. When the second card C2 is inserted
into and removed from the second card receiving slot 30, the inner
surface of the second guide arm 32 guides the second-side surface
of the second card C2, and the inner surface of the first-side
plate member 31a guides the first-side surface of the second card
C2. A bottom shell 31 covers a lower portion of the second housing
13, the second guide arm 32, and the plate member 31a. The bottom
shell 31 is provided with fastening members 31c for fastening the
bottom shell 31 to a circuit board (not shown). The bottom shell 31
may be formed, for example, by stamping and forming a metal
plate.
[0044] As shown in FIG. 4, a second card ejection member 50 is
installed on an external side of the second guide arm 32. The
second card ejection member 50 comprises a pivoting arm 51, a push
bar 52, and a push plate 54. The pivoting arm 51 is disposed on the
second housing 13 in a pivotable manner. The push bar 52 can move
along a side surface of the second guide arm 32 in the card
insertion direction X and in the card removal direction Y. The push
plate 54 is shaft-supported on the push bar 52 in a pivotable
manner and pushes and causes the pivoting arm 51 to pivot during
the ejection of the second card C2. The pivoting arm 51 is designed
to eject the inserted second card C2 in the card removal direction
Y as a result of pivoting. A push button 53 may be provided on the
push bar 52.
[0045] The operation of the card connector 1 will now be described
in greater detail. As shown in FIGS. 6A-6B, when the first card C1
is inserted into the first card receiving slot 20, the flange C1b
formed on the front end portion of the first card C1 contacts the
first inclined surfaces 24a of the elastic projections 24. The
first card C1 advances along the first inclined surfaces 24a while
pushing the elastic projections 24 downward to climb over the
elastic projections 24. Once the flange C1b climbs over the elastic
projections 24, the insertion of the first card C1 is completed,
and the elastic projections 24 return to their original positions.
Since the elastic projections 24 undergo elastic deformation, it is
possible to reduce the force required for the insertion of the
first card C1. Additionally, since the first inclined surfaces 24a
of the elastic projections 24 are designed to rise at a gradual
inclination from the partition frame 21 in the card insertion
direction X, the force required for inserting the first card C1 can
be further reduced. Upon the completion of the insertion of the
first card C1, the elastic contact members 15a of the first
contacts 15 make elastic contact with the card contact points (not
shown) of the first card C1, so that electrical connection occurs
between the card contact points (not shown) and the first contacts
15.
[0046] When the first card C1 is removed from the first card
receiving slot 20, the first card C1 is moved in the card removal
direction Y. The flange C1b of the first card C1 then contacts the
second inclined surfaces 24b of the elastic projections 24. The
flange C1b retracts along the second inclined surfaces 24b while
pushing the elastic projections 24 downward to climb over the
elastic projections 24. Once the flange C1b climbs over the elastic
projections 24, the ejection of the first card C1 is completed.
When the first card C1 is removed from the first card receiving
slot 20, the flange C1b must climb over the elastic projections 24,
so that the force required for removing the first card C1 can be
securely increased. Accordingly, the holding power exerted on the
first card C1 is made sufficient, so that there is no danger of the
first card C1 accidentally dropping out of the card connector 1 in
cases where an external force is applied to the card connector 1.
Additionally, since a force other than the elastic force of the
first contacts 15 is utilized in order to hold the first card C1,
the load applied to the first contacts 15 can be minimized in cases
where an external force is applied to the card connector 1 so that
damage to the first contacts 15 can be avoided. Moreover, there is
no damage to the card contact points (not shown) provided on the
first card C1, such as stripping of the plating, as a result of
numerous insertions and removals of the first card C1.
[0047] The card connector 1 is devised so that the flange C1b of
the first card C1 must climb over the elastic projections 24, and
the holding power exerted on the first card C1 can be sufficiently
increased by this alone. The second inclined surfaces 24b of the
elastic projections 24 rise at a steep inclination from the
partition frame 21 moving toward the card removal direction Y
compared to the first inclined surfaces 24a. Thus, an even greater
force is required when the flange C1b of the first card C1 climbs
over the elastic projections 24, so that the holding power exerted
on the first card C1 can be increased even further. The adjustment
of the insertion and removal forces of the first card C1 can easily
be accomplished by varying the number of the elastic projections 24
and the width 24c of the elastic projections 24. Since the elastic
projections 24 are provided on the bottom member of the first card
receiving slot 20, such a degree of freedom is obtained. Therefore,
in order to increase the holding power exerted on the first card
C1, there is no need to install, for example, any member that makes
elastic contact with the side surface of the first card C1 other
than the elastic projections 24. In cases where the elastic
projections 24 are disposed on the side surface of the first card
receiving slot 20, such a degree of freedom is not obtained.
[0048] An embodiment of the present invention was described herein.
The invention, however, is not limited to this embodiment, and
various alterations or modifications are possible without departing
from the scope of the invention. For example, the card connector 1
may be formed so that the first card receiving slot 20 is disposed
beneath the second card receiving slot 30, so that the card
connector 1 has only the first card receiving slot 20 or so that
the card connector 1 has two tiers of the first card receiving
slots 20. Additionally, the elastic projections 24 may also be
provided on the bottom shell 31 of the second card receiving slot
30. Moreover, the configuration of the elastic projections 24 is
not limited to that described herein, as long as the elastic
projections 24 elastically deform when the flange C1b of the first
card C1 climbs over the elastic projections 24. In addition, it
would also be possible to dispose a first card ejection member 40
on the external side of the first guide arm 22 of the first card
receiving slot 20. In this case, it would be sufficient if the
first card ejection member 40 comprises a pivoting arm 41 that is
disposed on the first housing 12 in a pivotable manner, a push bar
42 that can move in the card insertion and card removal directions
X, Y along the side surface of the first guide arm 22, and a push
plate 44 that is shaft-supported on the push bar 42 in a pivotable
manner that pushes and causes the pivoting arm 41 to pivot during
the ejection of the first card C1. The pivoting arm 41 would be
designed to eject the inserted first card C1 in the card removal
direction Y as a result of pivoting. Moreover, a push button 43
could be provided on the push bar 42. Additionally, in cases where
the first card C1 is inserted into the first card receiving slot 20
upside down, the elastic projections 24 could be provided on the
top shell 23.
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